What the ratio measures, and what it does not
The reward-to-risk ratio compares two distances on the same chart: how far price has to move against the entry before the stop is hit, and how far it has to move in favor before the target is hit. A ratio of 3 means the target sits three times farther from entry than the stop does — nothing more. It says nothing about how often price actually reaches either level. Two trades can carry the identical 3:1 ratio and behave in opposite ways: one where the target gets touched on most attempts, and one where the stop gets hit almost every time. The ratio is silent on which is which.
That silence is where the number gets misread. A high ratio reads as safety, because the potential gain dwarfs the potential loss on paper. But a system that wins one trade in five needs more than a wide target to survive — it needs the wins, when they land, to more than cover the four losses that came before them. A 5:1 ratio and a 12% real win rate can still lose money over a long enough run if the actual win rate falls even slightly short of what the ratio demands. The ratio sets a bar. It does not clear it.
The win rate you need to break even
Every ratio implies a minimum win rate below which the system loses money even though each individual trade is sized correctly. That minimum is risk divided by risk plus reward — the smaller the risk relative to the reward, the lower the bar. A 1:1 ratio needs wins just over half the time. A 3:1 ratio needs wins barely more than a quarter of the time. Moving the target further out keeps lowering that bar, which is exactly what makes a wide target attractive, and exactly why the bar still has to be checked against what the system actually does rather than what would be convenient.
That formula is not a trading rule invented for this page — it is the same expression that describes the odds of price reaching a target before a stop under pure randomness, with no edge in either direction assumed. Reading that a trade needs 25% to break even answers half of the question. The other half is whether real results, tracked honestly across enough trades, clear that bar by more than chance would. Our Luck or Edge? calculator takes a trade history and answers exactly that.
Moving the target until the number looks good
The ratio is meant to be read off a chart, not assembled to hit a number. Entry and stop usually come first, set by where a setup actually gets invalidated — a level that would prove the trade wrong if price traded through it. The target should follow the same logic: the next point on the chart where price is likely to slow or reverse, whatever ratio that distance happens to produce. Working backward from a ratio that sounds attractive, and placing the target wherever the arithmetic lands, drops the one thing that made the target meaningful in the first place — a reason tied to the chart for why price might actually get there.
A target chosen to produce a 4:1 ratio, sitting past a level price has already failed to hold three times, is not a more disciplined trade than a 2:1 target sitting exactly on a level that has held. The ratio moved; the odds of reaching it did not, and likely moved the other way. Our methodology page covers how we think about placing a stop and, by the same reasoning, a target — structure decides where these levels sit, and the ratio is only ever what falls out once that placement is done.
How to read each number
The headline figure is the ratio itself, followed by the win rate needed to break even at that ratio — the two numbers this calculator is built to move between. Distance to stop and distance to target restate the same two price gaps as percentages of the entry price, which travel across instruments better than raw price differences do: a ten-cent stop means little on its own until it is seen as a share of the entry it is measured from.
When a win rate is entered, an expected result per trade appears alongside the rest — the ratio and that win rate combined into a single figure, positive if the edge implied by both together holds up and negative if it does not, expressed in risk units rather than currency. Reading the ratio without the win rate shows what the payoff looks like. Reading them together, alongside how much to risk in the first place from our position size calculator, is closer to what a full trading decision actually needs.
